Cable Tray Size Calculation

Distance between each cable is 10mm.

Cable tray size calculation.

Ignore the neutral and earth conductor in three phase cables. What is cable tray used for. An example how to calculate voltage drop and size of electrical cable photo credit. Number of cable per trench is 1 number of run of cable is 1 run.

Cable tray should be perforated and 20 spare capacity. Voltage drop choose the maximum percentage of the source voltage drop. Calculate size of cable tray for following cable schedule. Practical guide on the amount of cable weight that can be installed tested in accordance with nema ve 1 csa e222 2 126 1.

December 2 2014 at 3 38 pm. This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air. Cable raceway tray support calculations. Per the national electrical code article nema 392 9 b cable tray fill calculations and cable tray sizing calculations will be computed as follows.

Distance enter the one way length of the wires in the circuit in feet. Download cable tray and conduit sizing excel sheet free calculator for electrical design engineers to determine the size of cable tray and the wire conduits. Cable tray is a bridge that allows safe transport of wires across open areas and gives protection against the overheating and fire problems. 7 once the calculate button has been selected the program will take you to the output page where the tray size needed will be displayed as well as the article of the nec that it falls under.

Cable tray is sized based on the number and type of cables required for the current and future need. Select a cable size or select auto. 13 responses to calculate size of cable tray excel sheet atta khan says. 6 once all cable information is entered hit calculate.

Cable trays may be filled 50 when using control or signal wiring. 1 2 no s of 3 5cx300 sq mm xlpe cable having 59 7mm outer diameter and 5 9 kg meter weight 2 2 no s of 3 5cx400 sq mm. Auto will automatically select the smallest cable that meets the three criteria for current rating voltage drop and fault current rating. Cable is directed buried in ground in trench at the depth of 1 meter ground temperature is approximate 35 deg.

A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area. It is recommended not to exceed a voltage drop of 5. On tue dec 2 2014 at 7 52 pm electrical notes articles wrote.